This Blower Accessory Kit is intended for use on 2016-present Vent-free 20,000 and 30,000 BTU units only. It doesn't work on 2015 or earlier models. This kit is a replacement fan assembly for these vent-free heaters. And because it's Mr. HeaterA(R), you know you'll get quality and durability with every use. 20,000 to 30,000 BTU units Replacement fan assembly for vent-free heaters Quality and durability Will work with 2016-present vent-free heaters. Item numbers: 651024, 651025, 651026, 651027, 651030, 651031, 651032 and 651033 It's time to vent and order today!